American special relationships with Israel and Saudi Arabia blind us to their dreadful encroachments on human rights, as well as confer impunity on their leaders with respect to accountability for crimes against humanity.

We live in a state-centric world faced with global-scale problems that cannot be met by the actions of single states, no matter how powerful, if assessed from the perspective of military capabilities.

We should not rule out the possibility that Trump's diplomacy could deescalate Middle East strife and international tensions, give the US a lower global profile and enable a more balanced world order to emerge, doing most of its damage here at home, through moves to implement his vision of nativist nationalism.

To be a hegemon is inherently ambiguous, usually implying some mixture of dominance and legitimacy, that is, being seen as contributing global leadership in a generally benevolent manner.

When Daniel Gorenstein was chair, he did mathematics from 5am to 12noon, spending the second half of his working day on administration. When I was chair, I also spent half of my time on research: every other minute.

The existing order is breaking down at a very rapid rate, and the main uncertainty is whether mankind can exert a positive role in shaping a new world order or is doomed to await collapse in a passive posture. We believe a new orderwill be born no later than early in the next century and that the death throes of the old and the birth pangs of the new will be a testing time for the human species.

Trump will have to take up juggling if he goes ahead and scraps the agreement with Iran and at the same time, seeks to avoid alienating Russia, and quite possibly France and Germany. These European countries are already nervous about what the Trump presidency means with respect to the future of the post-World War II international order that has essentially kept the peace on the continent since 1945. This order is far from perfect, of course, and under pressure from other sources, especially due to the rise of chauvinism and European Trumpism.